<template>
  <div class="top-right-btn" :style="style">
    <el-row>
      <el-tooltip
        class="item"
        effect="dark"
        :content="showSearch ? '隐藏搜索' : '显示搜索'"
        placement="top"
        v-if="search"
      >
        <el-button circle icon="Search" @click="toggleSearch()" />
      </el-tooltip>
      <el-tooltip class="item" effect="dark" content="刷新" placement="top">
        <el-button circle icon="Refresh" @click="refresh()" />
      </el-tooltip>
      <el-tooltip class="item" effect="dark" content="显隐列" placement="top" v-if="columns">
        <el-button circle icon="Menu" @click="showColumn()" />
      </el-tooltip>
    </el-row>
    <el-dialog :title="title" v-model="open" append-to-body>
      <el-transfer :titles="['显示', '隐藏']" v-model="value" :data="columns" @change="dataChange" />
    </el-dialog>
  </div>
</template>

<script setup>
  const props = defineProps({
    showSearch: {
      type: Boolean,
      default: true,
    },
    columns: {
      type: Array,
    },
    search: {
      type: Boolean,
      default: true,
    },
    gutter: {
      type: Number,
      default: 10,
    },
  });

  const emits = defineEmits(['update:showSearch', 'queryTable']);

  // 显隐数据
  const value = ref([]);
  // 弹出层标题
  const title = ref('显示/隐藏');
  // 是否显示弹出层
  const open = ref(false);

  const style = computed(() => {
    const ret = {};
    if (props.gutter) {
      ret.marginRight = `${props.gutter / 2}px`;
    }
    return ret;
  });

  // 搜索
  function toggleSearch() {
    emits('update:showSearch', !props.showSearch);
  }

  // 刷新
  function refresh() {
    emits('queryTable');
  }

  // 右侧列表元素变化
  function dataChange(data) {
    for (let item in props.columns) {
      const key = props.columns[item].key;
      props.columns[item].visible = !data.includes(key);
    }
  }

  // 打开显隐列dialog
  function showColumn() {
    open.value = true;
  }

  // 显隐列初始默认隐藏列
  for (let item in props.columns) {
    if (props.columns[item].visible === false) {
      value.value.push(parseInt(item));
    }
  }
</script>

<style lang="scss" scoped>
  :deep(.el-transfer__button) {
    border-radius: 50%;
    display: block;
    margin-left: 0px;
  }
  :deep(.el-transfer__button:first-child) {
    margin-bottom: 10px;
  }

  .my-el-transfer {
    text-align: center;
  }
</style>
